Calculation of Axial Compression Capacity for Square Columns Strengthened with HPFL and BSP

Table 3

Comparison of calculation results with test results of the axial load carrying capacity.

Cite	No.	/Φ (mm)	(mm)	(MPa)	(MPa)	Main rebars		Stirrups		Jacket reinforcement		Jacket stirrups		(kN)	(kN)	/
						Qty	(MPa)	Qty	(MPa)	Qty	(MPa)	Qty	(MPa)
Author	Z01		—		—	—	—	—	—	—	—	—	—	1080	1080	1.00
	Z02		—		—					—	—	—	—	1220	1234	1.01
	Z1		25		13.8									1490	1625	1.09
	Z2			34.1	32.6			Φ6@150	409					1720	1753	1.02
	Z3					4Φ12	368			4L	518	Φ3.2@60	1606	1770	1753	0.99
	Z4													1656	1753	1.06
	Z5							—	—					1640	1513	0.92
	Z6													1608	1513	0.94
Doc.; 19	C2		20	30.7	54.2									2608	2620	1.00
	C3			19.9	39.6									1849	1894	1.02
	C4			19.9	39.6									1849	1894	1.02
	C5			33.6	52.3					24Φ6	246	Φ6@50	246	2807	2785	0.99
	C6			33.6	52.3									2807	2785	0.99
	C7		Φ400	32.5	52.7									4000	3537	0.88
	C8			32.5	52.7	4Φ14	361	Φ6@200	251					4200	3537	0.84
	C9		20	16.6	42.7					24Φ4	366	Φ5@50	347	1464	1652	1.13
	C10			16.6	42.7					24Φ4	366	Φ6@50	363	1629	1692	1.04
	C12			22.6	49.3					24Φ5	347	Φ8@50	243	2225	2164	0.97
	C13	338	20	29.0	54.3					24Φ4	366	Φ5@50	347	2992	2701	0.90
	C14		20	29.0	54.3					24Φ5	347	Φ8@50	243	2420	2535	1.05
	C16		20	28.1	47.8					24Φ6	246	Φ8@40	243	2608	2526	0.97
Doc.; 20	C3	150	20	32.4	49.8	6Φ12	277	Φ6@150	281	Φ1.4@25	325	Φ1.4@25	325	578	647	1.12
	C4			33.7						2Φ1.4@25	325	2Φ1.4@25	325	680	689	1.01
	C5			33.7						2Φ1.4@25	325	2Φ1.4@25	325	640	689	1.08
	C6			32.7						3Φ1.4@25	325	3Φ1.4@25	325	740	705	0.95
	C7			33.1						4Φ1.4@25	325	4Φ1.4@25	325	780	737	0.95
	C8			34.5						Φ4@40	746	Φ4@40	746	960	964	1.00
	C9			33.5						Φ4@25	746	Φ4@25	746	1060	1147	1.08
	D3			54.1						Φ1.4@25	325	Φ1.4@25	325	710	903	1.27
	D4			54.3						2Φ1.4@25	325	2Φ1.4@25	325	898	931	1.04
	D5			53.7						2Φ1.4@25	325	2Φ1.4@25	325	908	925	1.02
	D6			54.3						3Φ1.4@25	325	3Φ1.4@25	325	940	958	1.02
	D7			54.2						4Φ1.4@25	325	4Φ1.4@25	325	980	984	1.00
	D8			53.2						Φ4@40	746	Φ4@40	746	1101	1182	1.07
	D9			53.9						Φ4@25	746	Φ4@25	746	1281	1381	1.08
Doc.; 28	JGZ-A2		20	21.6	34.3	4Φ12	363	Φ6@150	254	Φ6@50	446	Φ6@50	446	1414	1182	0.84
	JGZ-A3			22.4	33.2					Φ6@80	446	Φ6@80	446	1190	1088	0.91
	JGZ-B2			31.7	44.3					Φ6@50	446	Φ6@50	446	1732	1486	0.86
	JGZ-B3			33.4	42.5					Φ6@80	446	Φ6@80	446	1557	1416	0.91
Doc.; 29	ZB-1		15	20.1	21.6	4Φ10	248	Φ6@150	282	Φ1.4@15	500	Φ1.4@15	500	600	580	0.97
	ZB-2													673	580	0.86
	ZB-3													630	580	0.92
	ZB-4													630	580	0.92

Note: the table shows the reinforcement stirrups in this paper and in 29 articles, and the longitudinal reinforcement steels in 29 articles were hard steel. So no obvious yield strength was given; rather, ultimate strength was provided. L refers to angle, and Φ refers to diameter of steel bar. is the test value of the axial load carrying capacity, and is the calculation value of the axial load carrying capacity.